2–794
DTC: P14B7 and P14B8
P14B7: EGR valve controller temperature sensor 1 (Signal too low)
(EGR actuator temp. sensor 1 signal too low)
INFORMATION
1.
Technical description
• EGR valve is a butterfly type.
• EGR valve opening is controlled by engine speed and amount of intake air.
• EGR valve opening is adjusted by engine ECU and CAN communication.
• EGR valve will not operate when engine coolant temperature is low (≤ 40 C {104 F})
• DTC is issued when failure message is received from EGR actuator unit.
<Description of malfunction>
• EGR actuator system is malfunctioning.
2.
DTC set condition
(1)
DTC detection condition
• Starter key "ON".
• The battery voltage is in the range of 10 to 16 V.
• The engine is stopped, or the engine speed remains at 500 r/min or more for 5 seconds or more.
(2)
Judgement criteria
• When temperature of temperature sensor 1 (FET side) inside actuator is -50 C {-58 F} or less, and this con-
dition continues for 2 second.
3.
Reset condition
• Normal operation is restored and accelerator is not being operated.
4.
Indication, warning or system control regulation when the DTC is set.
• MIL: ON
• SVS light: OFF
• Engine output is restricted.
ENGINE (J05E)/TROUBLESHOOTING
Engine ECU
VNT
EGR
controller
actuator
Resistor
Actuator power
relay
Y2E
Y4J
Z90
NAT
X36
$4
EN01H02127030602016133
SHTS021270300718